The diffusive behavior of 63Ni was studied at 700 to 950C. The results could be described by:

D (cm2/s) = 3.8 x 10-1 exp[-50.0(kcal/mol)/RT]

A.M.Blinkin, L.S.Ozhigov, V.V.Vorobev, V.E.Semenenko: Fizika Metallov i Metallovedenie, 1970, 29[3], 615-8